Problem with the K5 seat unit Bracken are selling is that it is nothing like the one used on the HM race bike. They keep the rear guard and light unit and fit the seat unit over it. They also have to make some covers to fit over the back of the tank where the SD seat wraps round it. The whole thing looks like a right dogs dinner. What you need is the full K5 seat unit complete with lights and undertray (like the HM race bike) then make a hybrid seat, SD front part, Suzuki rear, to make sure it looks neat. Bet you can't guess what I've been thinking about over christmas. Also thought about the R! seat unit as this already has receses for the under seat exhausts. Hmmmm.
I think the bellypan Bracken are selling IS the Skidmarx one, it's the one they are supposed to be supplying with their race kit anyway (NEC SD Racebike), unless they have found someone else to make them and just not told skidmarx.